(CNN)Here’s a look at BALCO, the lab that provided steroids to several professional athletes, including baseball player Barry Bonds and track and field star Marion Jones.

The BALCO scandal began as two separate, independent investigations: one by federal agents in California looking into BALCO, and one by investigators for the US Anti-Doping Agency working on a tip from an anonymous source.BALCO stands for Bay Area Laboratory Co-Operative. Timeline: August 2002 – Federal agents begin investigating BALCO, a California lab suspected of selling banned performance enhancing drugs to athletes.June 2003 – THE USADA receives an anonymous tip that an undetectable, designer steroid is being distributed by Victor Conte, founder of BALCO. The tipster sends the USADA a syringe filled with the steroid. The tipster is later identified as Trevor Graham, the former coach of runners Jones and Tim Montgomery.Read MoreSeptember 2003 – BALCO offices are raided by agents of the Internal Revenue Service and a San Mateo County narcotics task force. Also raided is the home of Greg Anderson, a personal trainer for Bonds.October 16, 2003 – The USADA announces it has uncovered a doping “conspiracy” involving previously undetectable steroids used by track and field athletes. October 23, 2003 – A grand jury investigation into BALCO begins. Dozens of high profile athletes are subpoenaed to testify during the investigation.2004 – Jones files a $25 million defamation lawsuit against Conte accusing him of trying to “destroy her career and reputation” when he said he supplied her with performance enhancing drugs. The lawsuit is settled out of court for an undisclosed amount.February 12, 2004 – Conte, BALCO executive James Valente, Anderson, and track coach Remi Korchemny are indicted on charges of money laundering, fraud and possession with intent to distribute steroids. The following day all of the defendants plead not guilty. December 2, 2004 – The San Francisco Chronicle begins revealing secret grand jury testimony from several major baseball players, during which some of the baseball players admit to steroid use. Bonds testifies that he used a substance given to him by Anderson, but that he (Bonds) did not know they were steroids.December 3, 2004 – US Attorney Kevin Ryan requests a formal investigation into who is leaking grand jury testimony to reporters. July 15, 2005 – Conte and Anderson plead guilty to steroid distribution and money laundering. Valente pleads guilty to steroid distribution.July 29, 2005 – Korchemny pleads guilty to reduced charges. He is later sentenced to one year of probation. October 18, 2005 – Conte is sentenced to four months in prison and four months house arrest. Anderson is sentenced to three months in prison and three months house arrest. Valente receives probation. February 2007 – Troy Ellerman, former attorney for Conte, admits to showing grand jury testimony to a San Francisco Chronicle reporter. Ellerman pleads guilty to four felonies, including contempt of court and obstruction of justice. July 12, 2007 – Ellerman is sentenced to two-and-a-half years in prison.October 5, 2007 – Jones pleads guilty to charges of lying to a federal agent in 2003 about her steroid use. November 15, 2007 – A federal jury indicts Bonds on perjury and obstruction of justice charges. The indictment is in connection to an investigation of the use of steroids in major league baseball.

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